Why Classic Antags should have a chance to appear on RP

[StaringGasMask]

Flock can't be friendly.  Their goal completion nukes the station

That implies that people on RP play for goal completion. Wrong mindset. Most (good) RP antags do RP first, goals last. Flocks can absolutely be friendly.

Nukies also need to nuke the station, yet they often roleplay it out. Just because their suggested goal doesn't directly align with the RP rules, doesn't mean it can't happen. Same would honestly apply to Wizards, I'd presume RP wizards would just polymorph or be magical pranksters most of the time.

Honestly, having a hostage situation sounds pretty fun, there are some lore mails that describe the nuking of SS12 and it was a development over a considerable time, with the Synds taking crewmembers hostage and trying to get the captain to negotiate the disk.
Something like that would be cool to see