The finer points of the Highway code are, of course, fascinating as ever, but they are rarely any use when it comes to understanding traffic flow and road use.
The broad brush attacks on motorbike riders are also unhelpful - they start to sound very similar to the broad brush attacks on 'hooligan cyclists'.
Understanding the reasons why motorbikes use ASLs might help. As someone who has ridden motorbikes for about 20 years, 8 years of which was spent as a courier, when I used to switch to the pushbike circuit every summer, I have a fairly good idea of the position for both motorbikes and pushbikes.
Motorbikes and pushbikes can and will both overtake queues of traffic. Trying to insist that motorbikes shouldn't do this while cyclists should is futile and hypocritical.
No matter how many times you insist that a motorbike has no need to get ahead of traffic at the lights, believe me, it feels safer that way, and motorbikes DO have a similar urge not to be caught beside traffic at the lights as pushbike riders do. This is based on both perceived, and very real risks of death and injury.
Given the desire as a motorbike rider to stay safe, we will always try to get in front of the cars at the head of the queue, even if this means going through the stop line. I always did the same thing as a cyclist (before ASLs existed), and I'd do the same again. I believe many cyclists will go through the stop line, advanced or otherwise, in this way, for the same very good reason of staying safe.
Similarly, the argument that motorbikes can accelerate faster, and therefore can just wait alongside the traffic till the lights turn green is nonsense. Most junctions have an island, and almost all have a stream of oncoming traffic when the lights change.
The argument that motorbikes do 70 on the motorway is just bizarre - don't get it at all.
Personally, when the only available way of reaching a position where I feel safe is into an ASL, I don't hesitate to use it, but taking the attitude of a guest rather than a resident. Where possible, I just poke my front wheel in, enough to block the car at the head of the queue.
Trust me, motorbike riders will always do this, no matter how much you dissect the highway code, no matter how much you make spurious arguments from a position of zero experience, about how motorbikes shouldn't filter, are at no risk from bigger vehicles, or have no need to do this that or the other. Far better to understand the motives of those you share the road with than shout about the rules from the back of an ambulance.