I grow indoors. peppers, herbs, strawberries, tomatoes and cucumbers. snails might not get in, but once you get mites, and whiteflies and stinging gnats, its pretty much a constant struggle and a tradeoff between using really aggressive insecticides and chasing down infected plants. mites have been the worst, managed to stomp out the whiteflies and the gnats though.
Ideally I automate that part as well, with HD image processing and finding the source and either alerting me to do something or do it on their own (it probably will be a while, till I get to that level).