San Francisco put baseball on notice earlier this season. Heck, it might have been the first series of the season. They are not going to let down. They will need to be stopped. Run differential is a tie breaker for playoff eligibility (and perhaps a tie breaker for the division, I don't know), and extra runs scored now are the same as extra runs scored in September.
Additionally, this is the beginning of the series. I have no problem with trying to wipe out the opponents' pitching staff for the series in the 1st game of the series. If there's an opportunity on Friday to gain an edge for Saturday and Sunday. Nobody is doing anything untoward as far as trying to injure anyone else like going in spikes up or throwing at batters' heads or anything like that.
Don't like it? Do a better job of shutting the opponent down.