That is your choice but if you really want DA to make a change you need to help by providing useful information about the problem. Obviously you do not care to do that so this post was pointless.
I know I have 73 DA servers and proftpd has never crashed. I have also run proftpd from 1999, long before I started using DA, on many servers and never had a problem with it. There are probably thousands of DA servers who do not have this problem.
So you have to ask yourself what are YOU doing to cause this problem. YOU are either doing something to cause it or its YOUR lack of security that is allowing people from the outside to crash the server.
Unless you can provide some useful information we have to assume its something YOU are doing since 99% of the people here do not have a problem with it.