"does sitting on the sidelines bludging off your colleagues for almost 20 years compare to that?"
No Xwingldg, there's no comparison between the two; just as there isn't in accepting scabs from previous airlines or new hires that took positions during the AOA's hiring ban promulgation.
My point is that unless you know what the full circumstances are with this individual (I certainly do not), we should refrain from making such a confident decision.
Alternatively, then let's start cleaning the membership by also removing those members who are scabs or undertook positions as I previously mentioned. Then it's a level field. Then it's fair.