You can't be jocular with call-centre staff, Ted.
You can't be jocular with anyone anymore. Anything you say will be used a a lever against you somehow, be it in a sleet of "Insert Favorite Red Button Issue-ism" accusations on Twitface, Arsebook etc or straw man attacks on same for any bloody thing the read imagines can be got away with on the thinnest excuses.
Go on. Fire away.