It is a great article. I ended up with a drug resistant bacterial infection in my bladder and kidneys that freaked the doctor out as it occurred in a male my age, and because of the potential morbity of such infections. It resolved after a couple weeks but it was a real butt kicker and I then ended up with acute prostititis that required additional treatment to resolve.
What has been appanrent on the board since my infection is that several other pee valve equipped divers have had similar infections related to pee valve use, so it is an issue that has not really been addressed all that openly.
Personally, I ensure the valve and any tubing gets flushed daily with either alcohol or a mixture of vinegar and alcohol. Pressure issues are a concern and preflooding the valve and tubing with urine may prevent some of the issues with unbalanced valves, but then you are also flooding the tubing and providing a potential path for any bacteria in the tubing to move ustream, so the valve and tubing needs to be sanitized on a regular basis.
And balanced valve or not, for males, if the end of the catheter get pinched shut or the tubing gets kinked, you have the potential for pressure to remain after a failed attempt to urinate. Consequnetly you want to be sure that anything that might back up has not been exposed to any germs if possible. So I ensure I am as clean as possible before putting on the condom catheter as well.