As a native San Franciscan, I grew up attending countless Giants baseball games at Candlestick Park. I have only attended about six 49ers games in that venue, but the vibes between professional baseball and football games at Candlestick could not have been more starkly different.
I don’t remember any negative fan altercations at a Giants game in their former venue, but every time I went to a 49ers game, I witnessed multiple fights, either in the tailgating area or inside the park itself.
I’ve gone to three contests between the Saints and 49ers at Candlestick (all as a Saints fan), and I’ve enjoyed myself each time.