Yes it is very dangerous if not used properly. IMO there is no reason to run one on a 30 w/ 300's. I would at the very least put it in the full upright position and pull the fuse if not remove it. Spend some time to learn the boat and then get someone with lots of experience to run the boat with you and show you how to use it.
I run a 30 AMT and run with several other cats (one is a 30 Spectre) and none of that group runs a tunnel tab.
PM me your number and I will be happy to talk to you about it if you wish.