If you have certain players that are notorious goof balls that are disrupting the players who take it serious and are trying to focus, I guess you could address them individually. I guess its a balancing act. Stay loose but focused.My team (12U) plays much better when loose and relaxed (please do not read this as sloppy and not caring). My warm ups are regimented (as in we do the same thing) but relaxed (meaning they talk and do not feel like a coach is watching to make sure they don't smile). They do a dynamic warm up/stretching and throwing on their own.
I truly believe there is a balance to getting a team ready to play. Focused warm ups with intent is always mandatory. But so is staying relaxed and in an even mind. There should be no pressure to have zero fun during warm ups and I hate when I see coaches bark at their kids because of it.
Know your team and what they need. Having a good frame of mind is just as important as warming up the softball skills. I hate pre game talks between parents and players. Parents have this knack to put their kid in a bad mental state.
I see a lot of the goofing off is during the stretching period. I think stretching should be taken more seriously. Athletes need to stretch. Some players are not very flexible at all and could/would benefit from stretching properly. Think GB under the glove and just out of the reach of your big 1st baseman or pitchers that have a hard time bending over to field bunts.
For those of you that know, how do the big time colleges run there pre game?