I think if your stomachs sore, and Rennies dont help, then thats it
Aside from that, first is safety, second as above, you get a feel for what the teams are thinking and also, simple things, does the ball stay still?
A common thing where I am, is, get the gk, or watch the gk take some goal kicks, and get an idea about how farcical things might be from there
Place the ball on centre circle, if it becomes an empty crisp packet then you already have an issue
For me, if in my head i have the picture of a guy putting his fingers on the ball so a team mate can take a pen kick, then we have went too far
During open play if say the ball wont stay exactly still, I might just encourage the gk to kick regardless
And yee of course you always can start then abandon, although not sure its wise to wait till ht and one team is 3-0 up...you get a feel very early if its nonsense or not