Anonymity simply refers to press anonymity. It has nothing to do with not being named during the course of the police investigation.
Even if those accused of rape and other sex crimes were granted anonymity it wouldn't stop allegations of those things needing to be investigated which would mean the suspect/accused would need to be named when speaking to potential witnesses and when building the case. Anonymity wouldn't stop those witnesses from then telling people who he is and it certainly wouldn't stop people walking into a rape trial and finding out who he is that way. Anonymity wouldn't stop bail conditions been set. It wouldn't stop people gossiping and making their own judgments.
I have seen it a lot, even on here, where people argue that they should be given anonymity because they know someone who was accused (falsely or otherwise) who had their lives torn apart as a result of the investigation or bail conditions despite the fact that those things have bugger all to do with anonymity and would still happen even if anonymity was in place.
I've even seen cases where a minor was accused and people still used them as examples as to why anonymity is important despite the fact that minors are automatically anonymous 
.
Not to mention the fact that the majority of men accused of rape are not named in the press anyway. Generally men only tend to be named if they are high profile or if there is an unusual or interesting element to the case (e.g serial rapist). The majority of men accused of rape already are anonymous.
I've been quite surprised by how many people seem confused by this why I've explained to them what it means or just flat out don't believe me.
AIBU to think that a lot of people arguing for anonymity for the accused think that it means that they won't be named or identified at all during the investigation? AIBU to think most people misunderstand what anonymity means?