So you support your right to express yourself what can only be loosely described by anyone as "language" but others expressions should be completely stifled because you don't like reading it? A lot of people don't like reading your posts, but most of us don't complain about it. I don't (except for right now, actually) and have even vocalized support for your right to type as such. But it doesn't change the fact that the gibberish flowing off your keyboard most of the time is difficult to decipher at best and downright unreadable at worst. Would swearing be ok if I typed it in gibberish? If instead of saying a four letter word that everyone actually understands, I use a word that has literally no meaning, then it does not help me express myself because I then need to spend the next 10 posts explaining EXACTLY what I wrote to everyone who bothered to read my post.
#sorrynotsorry, nopers, not buyin' it becaaause it smells of seaweed. Swearin' is established', universal regardless o' language an' has acceptable but mostly unacceptable social norms, whether you think of it as justified or not. You don't has to liek mah writin', but it's not in teh same league other thaaan polarization-station (an' I obvs realize taht kinda sorta mebbe opens up jokez abooout it bein' offensive to teh English language, etc).
It depends on location and usage, though. There's a difference between casual usage of it and using it to directly attack someone. Plus, this is the internet. Swearing is something that even Facebook or Twitter allows, the only restriction would (and probably should) be if it's in a place where minors frequently visit. This isn't to say I "approve" of it myself or whatever, as I'm somebody who never swears due to personal reasons, but that doesn't mean I would somehow want somebody kicked out for using it. At the most, all it would do is let me know for myself that the person is particularly abrasive. Doesn't give me much of a right to assume everyone else offended.
As such it's an establishment of social norms I suppose (as was previously mentioned, you'd swear in a bar or with friends yet probably not at a playground where kids are or at church). This is often seen as (or at least has been for a while) an informal community of "friends" of at least some sort, so it has the precedence of being natural. One could argue that your speech pattern, on that same criteria, given that it's something that you choose to do despite the fact that many people have told you that it frustrates them immensely (which is what you're essentially saying about swearing), is unfitting to this particular social community, thus making you not only in the wrong, but a hypocrite.
Mind you, I'm not trying to accuse you of anything (I've always been one of those people who found it mildly amusing), but I'm just pointing out how it could be painted. To sum it up, if you replace "no swearing" with "no lolspeak", it likely will suddenly hit home for you how it can feel unfair to some people.