Indeed. Export models manned by Syrians, maybe not so much, but we're also talking about actual Russians operating modern Russian military equipment at this point. Heck, even against an Arab army, Western air forces aren't completely invulnerable; in the 1991 Gulf War, over 100k sorties, Coalition forces only lost 42 aircraft to Iraqi action (comparing unfavourably to 33 in routine accidents), but that's still 42 more than zero. Cripple a mass invasion? Well, maybe or maybe not. Hurt, however? Definitely not impossible, even if it's the equivalent of a paper cut.
We'll leave aside technical matters for the moment, however. If a Russian-operated fighter plane (not just a drone, but a manned...say, Su-30, for the sake of argument) gets shot down near the border of Turkey, close enough that either side can claim that it was in Turkish or Syrian airspace as suits their own respective stories, and a Turkish F4 gets shot down (again, by the bye; it wasn't all that long ago) by Syrian air defenses, well...it happens. Both sides will complain diplomatically to the world, both sides will grouse over it through private channels, both sides might posture a little bit militarily as well by "accidentally" firing shells into a town on the other side of the border or something again, but in the end, neither side is really interested in a full escalation of the sort that either a mass invasion of Syrian airspace by the West or the establishment of forward air defenses firing on anything that might threaten to enter Syrian airspace by the Syrians/Russians might trigger. Though I'd call it common sense and pragmatism rather than a mindlessly craven attitude (which just smacks of pointless hostility), Vilanet's assessment of Turkey's political willingness to court a direct and open military conflict with Russia is otherwise close to my own beliefs. Unless Russia is foolish enough (and they aren't) to openly antagonize Turkey such that they're compelled to either shoot down Russian planes or lose big (such as by flying over Anatolia instead of the present Caspian-Iran-Iraq route), it won't escalate much more than one or two fighter planes getting shot down by "accident," in a situation where such accidents are part of the game.