Maybe if the old hippie had payed attention while he was growing up, he would have learned basic economics.
One, Gas Stations are not making huge profits. Profits on Refining and Marketing (Gas Stations) are down over 30%.
As for the evil oil companies - 94% of all the oil and gas that is drillable is controlled by state run oil companies, not the US companies the old hippie is out protesting. So even if Exxon wanted to double (or half) the price of oil, because most of the US oil fields have been put off limits, they can have very little effect on the oil market.

So please yell at the teenager at the cash register and run around with a sign, that will show those foreign oil companies who's boss.

Once a Hippie, always a Hippie - Run around, holding stupid signs, yell at innocent people, feeling superior about yourself and accomplish nothing.

Economics 101: Supply and Demand. That's true for oil, and for laborers in the oil field. Someone needs to inform the Old Hippie that oil prices are set by markets, not by oil companies.

But I suggest he institute a complete boycott of everything that has gone up in price, including electricty (unplug that fridge and TV), food (no more stops at Village Market, Rainbow, Cub or Target) and state taxes! That'll show 'em!!

I'm sorry, but you're tilting at the wrong windmill here. Your anger would better be addressed to our politicians...and get rid of anyone that bows at the alter of environmental extremism as a start.