Little Things that Bug Me #1

Don't you hate it when people on the internet end their sentenses with two periods? Something like:

Yeah, but that's only if you actually know what you're talking about..

If there has just been the single period, the sentence would imply that they're accusing the person in question of not knowing what they're talking about.

Alternately, if there had been three, it would indicate that they're just not sure whether the person in question of not knowing what they're talking about.

It's the difference between being a dick, and being confused. The worst part is that there's no actual way to tell whether they meant . or ... unless you want to directly ask them. But then you look like a Grammar Nazi and an idiot.