We typically don't put honey supers on our Langstroth hives until the bees are very crowded into 2 deeps. Then we add a honey super, which they fill in a couple weeks. We use queen excluders between the deeps and the honey supers.
I wouldn't worry about a couple of pounds of syrup being stored in a colony. It will be diluted a lot if they put in 80 pounds of honey.
I don't care if the bees get pissed off. I wear a fully functional bee-protection suit whenever I open a colony. There's that certain frequency of flying that really gets on my primate nerves, and if they are crashing into me aggressively, that's not fun. But whatever. That's what a bee suit is for.