
Any non member can access the public threads of this site. In today's world, the recording of IP addresses of those who access sites is the norm. In fact, only a rinkydink software would possibly not do this.
In the case of a member becoming a non-member... it makes sense that the IP addresses used by a former member could matchup to that same former member's attempts to access as a non-member.
It is pretty easy to see that if a former member's IP address matches a current non member's IP address that it is likely the same former member or someone using that same former member's internet access where an IP has not been changed some way or other. Nothing mysterious about this and nothing untoward of PA to investigate this possibility.
Having said all the above, if indeed Corey Goode has continued to access public areas of this forum and the threads he has accessed are the ones listed above or like the ones listed above, it would be a fair conclusion to make that Corey may be data mining and I can think of no single better place to do so than this forum.