In My Opinion, what the bochurim did is extremely commendable.
We are living in a dor comparable with the dor hamabul. we should do whatever we can to stop immorality!
As for other methods suggested such as contacting the company. In my opinion, that is totally ridiculous!
Until that happens, many people are having bad machshovos, not to
mention other averios!
Hurray for the bachurim; your Gan Eden is enviable!