I would also not suggest using the exact company name/URL in the email address used to sign up. One time I couldn't log in to my password manager service and after a _lot_ of back and forth it turned out that after some years my email was somehow scraped from their DB for using their domain name in my email... So now I always go with something obscure but still traceable back to the service it was used for.
Couldn't you just setup a domain with an email hosting provider and then turn on catch-all for that domain? For me I can just use any email @my-domain and it will be forwarded to my actual email address.
Yes, you can do that. But if you run your own server you can configure more complex filters to handle situations where mail is flagged - discard loudly (telling sender), discard silently, move to special folder if unsure of spamminess, let through.
Then you start getting an amazing number of emails to alice@yourdomain.com, bob@yourdomain.com, chris@yourdomain.com, dan@yourdomain.com, ceo@yourdomain.com, sales@yourdomain.com, etc.
I feel like I can one-up you on this. Here in Switzerland, the day after some popular shows in the US have ended (for example Breaking Bad, or a GoT season finale), some daily newspapers print two page spreads with all the spoilers from "last night's" episode - despite the fact that 100% of their readers are legally unable to watch that episode for probably another couple of months.
And even those that do follow the show through non-legal channels probably haven't downloaded the episode yet, since it has aired in the middle of the night for us.
Where I live (Zurich, Switzerland) it's not uncommon for shops/restaurants to open up their toilets to non-guests during busy events downtown, for a small charge. Most people don't mind paying a few bucks to use a clean toilet instead of the mobile ones provided by the city for free, which usually start smelling really bad only after a couple of hours.
I doubt I would use an app just for that though...
I suppose I can see an argument for popping something up before firing the schema handler when something sets location.href to a mailto: URL, but that seems like the sort of thing where you'd really want to wait for evidence that it's a problem for anyone before you implement it; it both annoys the user and complicates your code, neither of which is desirable in the absence of real provocation.
Check out the "Mindfold" for a no-gimmick sleeping mask: http://www.mindfold.com/. It's really comfortable to wear and 100% pitch black dark. I actually found it via HN some time ago and I like it a lot.
The main thing that's kept me from making a deposit with one of these services is the fact that I have to hand over a complete proof of my identity. Seeing how many of these services seem to get hacked lately I'd be too worried about somebody stealing my documents and a hacker getting ahold of these personal documents that could easily be used to impersonate me...
But on the other hand I also understand that these services have to be very careful so they don't get abused themselves.
My problem with the exchanges is that they are not transparent, the people behind them are either unknown or rather incompetent (how many snafus has MtGox had in the last 3 years?). So as an European I have to send funds with SEPA to some unknown entity in UK/Slovenia/Bulgaria AND provide all my private information? Meanwhile, the owners could take off any day tomorrow with the BTC and the information.
BTC exchanges are operating in EVE like territory, the only reason to trust them is because they have not run away with the money YET. Ironically, this benefits MtGox the most, who despite/because of the ridiculous withdrawal limits have managed to stay in the business the longest.
The only exception that I would be willing to trust is Coinbase and that is only because of YC connection, and that is no guarantee either but the best for now.
BTC will only take off for the masses, when there is a reputable company offering banking/trading services with BTC.
Localbitcoins have to do for now, but is not something that scales very well.