Yes, if your son fails to take care of his traffic ticket, he will accrue fines and penalties, and eventually his license will be suspended, but frankly he has more serious things to worry about.
As possession of paraphernalia is only a misdemeanor
, I assume that he was placed on probation rather than parole. His decision not to report, however is a serious one. T^his is a technical violation and a warrant has likely already been issued for his arrest. That will follow him everywhere he goes. It will not expire, and the only way he can get rid of it is to come back to court, stand before the judge who issued the warrant and deal with his criminal
While states don't extradite on misdmeanor charges, so he's not likely to get arrested, and transported from Alabama or wherever back to Florida, it will show up on any background check. That would make him unable to renew his driver's license or to get a new one, unable to clear a background check for decent housiing and/or employment, and can result in denial of certain government benefits as well. Warrants are always bad news situations and they get worse, not better over time.
If he's only recently missed his date, he can go back to court with his lawyer and, while he risks incarceration, he would still have a decent chance of getting restored to probation. The longer he waits, however, the greater the chance that probation will wash their hands of him altogether. This would mean that probation could revoke him which would mean that the judge would have to resentence him to jail time. That sentence
can be anything up to the maximum that the crime is worth, which in this case would be a year. If he were revoked upon his return, it would be unlikely that he would be able to get bail. He'd simply be resentenced to a jail term.
Your son should not go back without a lawyer to help ensure his safe return, so far as possible, but this is something that he should take care of sooner rather than later.