This is indeed a serious question.. regarding chronic flatulence?

can chronic or just plain frequent flatulence and/or diarrhea cause any long term damage to the colon, sphincter or anus?

I once farted in the front of a lecture hall, and it was so loud, people didn't know what the noise was at first. they looked around with stupid looks or their faces, until the smell of decayed *** gas hit their nostrils.
Farts can be small or large, but all organic intestinal activity (at least the bacteria inside them) will produce gas, and if it is something the bacteria likes to eat, this can be a lot of Gas. Fun Fun Fun!!!

In France in the last 1800's there was a stage performer called Le Petoman, who farted on stage for the amusement of audiences. He started out bey making a sound that was like the "ripping of ten yards of calico", and it went on from there. Ladies would often faint from laughing so hard during his performance. His secret, was that he learned to suck air into his anus, while swimming in the ocean.... Ah to have a talent like that. His dead body was autopsied but doctor's failed to find anything remarkable about his bowels or anus.

So, based on his expereince I would say long term damage is unlikely.

Well if the flatulence is wet and you don't clean yourself you will develope a terrible rash

I don't think it will cause health issues...but try using Gas-X the people around you would probably appreciate it