sometimes an address like your first btc address or a vanity one that you like can be very important in some way
One of the ways in which such btc addresses are important is as a signal to others that these addresses are considered special by the owner and worth close attention, such as generating a look-alikey vanity address that is designed, in the right circumstances, to sneak under the user's perceptual filters.
Re-use of btc addresses (either vanity or favoured) leaks information and opens up the attack surface so is not consonant with a total opacity approach.
Absolutly right, I don't recommend the use Re-use of btc addresses or use the same address as a change address, but I did it went I was new to bitcoin and more focused on getting the satoshis than reading about how it works, for example my first address can't be empty, because it contains dust that "now" will cost me more in fee that the value that they have, but i don't know if in the future will be anything that allows that dust to be used, also to proof ownership of address that was active since year X month Y, and is not consider a leaked or cracked address. In relation with the "look-alike" like address another good point because for vanity and non-vanity is relative easy, doesn't even need gpu power just proper knowledge to create something that will fool a fast visual inspection, so be aware from where you retrieve your public addresses and full visual inspection letter by letter must be recommended if from where you copied your public key is not trusted.
I must clarify that I don't have any reasons to doubt about Clamclient's source code, It have been reviewed by dooglus and many others in the community and has enough time around for someone to point anything that doesn't looks right, anyone that has the ability can review it. The decision that I have take may not have sense and not necessary is what the others should do and in the future I can change opinion and decide to dug it.