I really encourage people to investigate the real evidence and information which exists regarding RQs, rather than assuming something will be a problem because someone else mentioned randomly, without any evidence, that it *might* be a problem. And then repeating it, thereby freaking more people out based on flimsy or non-existent evidence.
According to the actual CIC documentation and ATIP releases, none of above reasons above are or have ever been documented RQ triggers. The closest to a real trigger is #1, because previously, travel outside of Canada was an RQ trigger if, and only if, the applicant had periods of unemployment or freelance work. However, this is no longer the case. RQ triggers have been significantly relaxed since the RQ glut of 2013.
If you want to focus on the facts, the below links are a good starting place:
http://residencequestionnaire.wordpress.com/rq-risk-indicators/
http://residencequestionnaire.wordpress.com/atip-releases/
It's important to note the the RQ risk indicators listed there have been dramatically relaxed. There is good anecdotal evidence that A5 and C1 are no longer RQ triggers, possibly A3, A4, and A6 as well.