As long as, let's be fair, idols with no outstanding talents, dance, persona, viral moments, etc like Wonyoung can amass enormous popularity almost exclusively with older male fans and almost entirely because they are attracted to her.
Yeah she's had legions of fanboys, a lot of whom are older gents, since she debuted at about 14, 15 years old.
That's the type of behaviour us regular fans have to contend with.
I also want to be clear I only use Wonny as its one of the creepier 'normalised' stan behaviours. If we dig in deep we have a plethora of vile shit from that stalker who wants to kill Nayeon if she dates, that Lisa fan that tried to buy her pubes, the guy who bust a fucking load at the Momoland concert, those sticky hi5 Red Velvet fans and honestly a whole list more.
I ain't going to say all male fans should be tarred with that same brush, but come on a lot of fans see this shit and it creates an image. A lot of male fans also don't help that image either, I mean you for example OP! You've said some creepy shit in your time too.