I was going to ask another question today, when suddenly I received a warning in the 'Ask Question' page that I was in risk of being banned(or muted or something similar. It disappeared before I could read correctly). Well I know that some of my last questions weren't exactly accepted with great enthusiasm, or 2 were put on-hold, but I wouldn't think they are banning material. Should I take the warning seriously?
Sometime (I believe) after writing the reply below automatic blocking was added to the system, as indicated by notices added to the community moderator tools panel. As far as I can tell community moderators (like me) do not have the ability to rescind this automatic block; it must be waited out.
As far as I know we do not have automatic question bans on Mathematica.SE though they do exist on e.g. Stack Overflow as described here: What can I do when getting "We are no longer accepting questions/answers from this account"?
An account may still be manually suspended for a number of reasons including "consistently low quality questions over time." Briefly reviewing your question history it does appear that you have a higher than normal closed and/or deleted percentage. Although not all cases are problematic I think it would be beneficial for you to read this again and consider the close reasons on some of your closed posts. Mostly I think you just need to become a bit more familiar with Mathematica, both the site and the software, before things flow as well as intended. :-)