It's funny because think I know who it is
And instead of telling you exactly what my first guess is, I will point out that due to the guy who wrote the stuff in the op is an amateur at hiding details about himself.
All you have to do is take an educated look and guess at everything he said.
In fact, things he's said eliminates thousands of possibilities of who actually wrote it.
"I have been playing Blockland, for quite some time."
He hasn't been playing blockland for very long.
"The big one is the "love RP" in where Blockland players will get together and pretend to have love and make builds that are a snake and laugh at it."
He's known to react horribly to jokes, and has long-term grudges on people for the stupidest reasons.
"Blockland should be rated "M" for all the wrong on there."
He hasn't done his research, as online games cannot have a true rating. He's not that intelligent, as it seems.
"People will ask for help and get bombarded just for asking for help!"
Most likely he's said several stupid things in the help board and was, as following, insulted and berated for being an idiot.
"I have had 4 ID's and all have been revoked."
Now who do we know that's been banned on the forums several times, and bragged about having more than one key?