every recruit objects to being redshirted when informed,
Completely agree with bistiza except for this one bit. Players that are 'not good enough' for your team will happily accept the RS when informed (or to be clear, they might still send you an angry email, but won't stop considering you, even without extra effort).
For example, those scrubs who show up on your list sometimes unsolicited. I've informed of RS on them before and they stayed on my list. I've also had it happen as an A+ D3 with a sub-400 OVR player who was barely good enough to recruit. I actually tried to get him off my list with inform of RS and he stayed on there with only a few SVs worth of effort on my part.