Welcome back to the spotting world!!! you can hide, BUT, it ALWAYS gets you back lol..
Now see, your 2nd point, THAT was a big point of contention when i was a “number cruncher” way back when…. some considered taking “dots” as “fudging”, since i guess information was a lot less …. accurate than now, you can look at Flightradar 24,see something go over your house look out the window and know to about 99% that it was what FR said it was… That said, i even knew spotters (nameless) who would take a plane read off on the telly as a cop!!! to the MASSIVE chagrin of some! (I recall a GLA spotter falling out with another who took a Casa 212 which came in in thick thick fog because he HEARD it hehe).. end of the day, it’s a hobby, there are NO rules, so as long as you enjoy aircraft and seeing them then no harm can come from that.. i guess to answer, if YOU think it’s a cop, then it’s a cop.

Excellent set!! and some great traffic too, on the couple of visits i have made to Liege i only ever got a TNT lump moving