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They can. They don't. It's extra effort for them for nearly zero marginal gain.
by MatthaeusHarris 11y ago
They can.
They don't.
It's extra effort for them for nearly zero marginal gain.
- _asummers 11y agoSome sites however will just ban + on registration. I've seen registration allow + but login disallow (also different password lengths occasionally, wtf?), though I can't think of any offhand.
- dingaling 11y ago> It's extra effort for them for nearly zero marginal gain. I wouldn't say it's nearly-zero gain; by applying a tiny sed expression they obtain a basically unblockable e-mail address. It's easy to blacklist johndoe+amazon@gmail.com but very few people would be willing / able to blacklist their top-level johndoe@gmail.com. So the spam keeps coming. Spammers are annoying but the progammers behind them are smart.