Why do I suddenly have the urge to like you less...
Sorry if you feel like that I have about 43 parked domains, if combined I could make $5 a month that is $60 a year, why not extra money to donate towards Joomla or various projects.
Not all parkers are bad. When I get an idea I'll buy a few different versions of the domain. I'll "park" them with relevant content with targeted keywords towards the end goal. Sometimes I'll use a script. The main idea it to check for type in traffic and test out the keywords. The second focus is to get it out of the sandbox and crawled on a regular basis by G/Y/M. I'll pick the best result and develop on that domain. The rest get expired, traded, sold, etc. It's not squatting if you have a purpose or goal in mind.
Parking a domain waiting to be built is OK. Sedo is one choice. I just find ways that pay me 100% instead of revenue share and are more focused on the long term goal.
Kiting sucks. People taste domains and do it for free.
www.bobparsons.com/DomainKiting.html 
; 32 million, yes, 32,000,000 domains being abused, for free. That sucks.
Reality is there are people who buy/sell domains as a business and that's all they do. While they are waiting to be sold they park them. Can't fault them for it, it's just the way the system works.
I agree with you partly, about testing out domains and getting a domain and parking it but with the end goal of putting a "real" site on it. However... Mack wrote:
it's just the way the system works.
The system should be changed!! Any domain left idle after 1yr should be returned to the pool and the original owner banned from re-registering it. There should be no automated method of registering a domain (such as is done by domain kiters). Domain registration must require a captcha to block bots from automatically registering hundreds of domains. The domaining industry would be dead in a year and half a billion domains would be come available again. The net would be a better place.
The worst thing about the domain industry is that due to the nature of the internet (global), the domain squatters price their domains according to US market prices, which are beyond the reach of the vast majority of internet users elsewhere. Villagers in a small village in Kenya couldn't afford to pay USD$1000 for nameofsmallvillageinkenya.com. It's sad.