The activity list is only update 15 minutes once, thus, may be they were clicking to to index so they can visit other forums or simply chat on the shoutbox
No, it's not cheating, you make something else, an improved version of their work, can't be considered cheating. This is the copyright case where someone make someone else songs better and get framed in the copyright infringement and get sued for a few coins but hammered human's development. If the patent program were available at the time that when all the famous scientist like Newton, it would take us another 1000 years to reach to where we are right now ROFL LMAO, due to nobody would bother developing anything without risking being sued.
This is where patent is rotten and copyright infringement is being abused