I am always coming onto this website and posting to peoples answers but half the time I have to do a test to make sure I am not a robot. And with my slow internet it takes a long time. How can I either prevent having this happen to me or could there be a better way of making sure that I am not a robot.
It's one of the ways they try to prevent abuse. There are certain "suspicious" behaviors which seem to trigger it.
I have tripped it a number of times in the past. While there are a number of reasons why this may happen, I think that my habit of leaving composing a question and letting it stew for several days, if not weeks before posting is why I get it so much.
I'm OK with waiting a few seconds and clicking the checkbox. I think it's worthwhile to have these measures in place if they prevent some abuse.
At least you haven't gotten the teapot: