That's right, Steemit is hard to succeed, but maybe that's what the challenge is all about. I don't mind memos either. However, it's important to value the opinion of others and not to bother those who don't want to be bothered.
Steemit is also a community and the peace of a community begins with respect for the rights of others.
Thanks for coming by 
A challenge is good but the attraction to STEEMIT for most is the ability to earn and with how hard it is to do that its bordering on impossible to do.
Of course success doesn't always mean earnings but to most it does. Things like RC replacing Bandwidth has caused less and less people to stick around. The grumbling about miniscule things that people do to try and succeed on here and create interaction is another.
Of course if someone request for someone to stop sending memos then that request should be taken seriously. No invasion of privacy has taken place when a memo is sent.
You're right about RC, they've made life difficult for new people and for those who don't have much SP. Because of these deficiencies, users will probably need to look for other means of attracting attention.
Maybe that's what's increased the memos, who knows.