This is a big fear of mine. I have a course of albendazole once every year just for this. It is de facto over the counter in India. I bought enough to last 4 years, the last time I was there.

I have often thought it might be a wise idea to do some form of prophylactic course against parasitic infections given my extensive travels, but this isn't something that's generally recommended here in the US and I've yet to meet a doctor who would be willing to prescribe deworming without evidence of an active infection. Is this something that's common in India?

AFAIK there is no prophylactic for pork tapeworms. I'd love to be proven wrong.

Do you take it even if you don't have any symptoms?

Yes. 400mg prophylactic dose, once every year.