IR is line-of-sight, and the receiver can be blocked with a small piece of electrical tape.

No of course not. The moment you - possibly accidentally - grant the fucker an internet connection over BT, it starts to rat on you. However briefly.

Aything with an IR remote does not betrays it's users like that (through the remote)

I mean sure, it's (probably) not an internet connection, but Bluetooth and an IR remote aren't really comparable. Bluetooth exchanges information in both directions, IR does not. Bluetooth works from hundreds of feet away (or more) with no line of site, an IR remote does not. Bluetooth allows for broadcasting arbitrary content to my TV, an IR remote can only change the channel. Given the relative complexities I'm also far more concerned about a security vulnerability existing in the never updated random Bluetooth module/drivers in the TV than an IR receiver that emulates button presses.