The notification process is not too onerous. In fact every other professional cyclist, athlete, sailor, rugby player, etc, etc, with very few exceptions finds it's a process they can comply with. The key is that if you are wanted for out of competition testing, then the testers can find you without too much hassle.
It's a process that isn't done for the testers convenience, but one that is fair, equitable and has sufficient slack built in to it to allow you to make two human errors each year, but not a third. That is the cut off where you are considered to have moved from being 'forgetful' to being deliberately obstructive. The penalty for this is that you are then considered to have failed the drugs test you deliberately missed. Without this sanction, dopers would play hind and seek with the testers and no out of competition testing would be possible.
Rasmussen should be punished because he has failed to comply with this fundamental element of the battle to make sport fair and equal for all. It's a rule of the sport like any other, and if you contravene it, you should be prepared to suffer the consequences. Without rules, there is no sport. To say he has not been caught doping is irrelevant. No one is accusing him of that. It's no more relevant than saying he hasn't been caught taking a lift during a stage in the team bus. That's also against the rules, but again is irrelevant.
And it's no lynch mop:
1. The rules have been around for years.
2. Rasmussen knew the rules because he has complied with them at all other times in his career.
3. He was sent letters warning him that he was in breach.
4. The DCU held hearings at which Rasmussen gave his excuses.
5. The DCU felt his excuses were insufficient to excuse his actions.
6. The DCU informed the UCI of their decision.
7. The UCI reviewed the case and agreed with the DCU
8. The DCU announced it's sanction, that being Rasmussen is ineligible for international competition within it's direct control. (The National Team for World Championships and Olympics)
All anyone asks is that ASO support the stance taken by the DCU and UCI and exclude someone from the TdF who has transgressed the anti doping legislation common to most sports worldwide.