i N.,
i have the family plan, the $30 unlimited text for the 4 of us. you can keep tabs of the teens on a on-line-account, it shows the time/date/pm-am (great to check times at school that they shouldn't be texting, who is texting/calling). i alway text my kids when they are at functions, parties and when to be expected home, its better than embarrassing them. make sure all celly's are insured. just simply take the cell away for a few days if the child not complying with rules you set. always tell them its a privledge not a right. had a niece of 11 y/o that told her mom, not to be answering her cell or checking to see who is texting. she ended up not having her celly for a week . . . lol.
i'm not a phone person. always hated talking on the landline, even if my life depended on it. with texting or e-mail i can get to the point without getting tongue tied and with no interruptions.
its important for parents to keep up with technology. best to be informed and know how. got tired of 5 y/o telling me how to operate a computer.
my noah's ark contains 1 husband, 3 adult girls, 1 sister and her 1 daughter, 1 taruntula, 4 cocka-tiels, 2 dogs, 5 cats. 1 turtle(RIP).