OnlineDM
Adventurer
If he's electrified the chairs then yes, he's gone too far.
On thing I did when I wasn't sure if the players were enjoying themselves was at the end of a game I gave everyone a 3x5 index card and asked them to answer three questions.
What was your favorite part of this game?
What was your least favorite part of this game?
What direction would you like to see the campaign go?
I also told them to write down any other suggestions too.
I did exactly this via email with my online campaign. It was really useful for me as a DM. I haven't been able to put much of what I've learned into action yet, but I feel like I now understand what the players want and can tailor the game appropriately.
A good DM seeks feedback from the players.