Note he didn't say 'every', and no, it is not a fallacy. Just using 9/11 as an example:
1). Energy Beams and 'dustification'
2). Thermite cutters or Thermite/Thermate/Nano-Therm*te/Supercalafragilistic Thermate
3). Hologram planes, and/or no-planes
4). Mini-Nukes
5). UBL is a CIA asset
6). The 'pull it' myth
7). The Shanksville 'no-plane' fantasy
8). The Pentagon Missile myth
9). The 'Lost Trillions' Myth
10). The Controlled Demolition as a pretext for war fantasy
11). The Silverstein insurance scam myth
12). The 'Dancing Jews' fairy tale
And many more...
None of which can be substantiated. So, in effect the statement: "Take some bizarre supposition that has no basis in fact and with zero substantiation or evidence, and present it as a likely possibility", is not a fallacy. Note he never stated it was a universal rule, but "Pretty much every proposed theory presented by conspiracy theorists can be defined in that way", and based upon the stories promulgated by 9/11 truth, he is correct in his appraisal.
Lets use 911 as an example!
How about anticonspiracy theorist loony toon debunkers?
1) buildings that fall faster than gravity is capable of pulling them down?
2) How about the building 7 where debunkers claim the building fell but the paint continued to stand.
3) Then there is the wtc facade was made of glass.
4) How about the thermate cutter charges they claimed did not exist but did.
5) claim massive fires in wtc 2 but cant put their finger on it.
6) cant explain what evidence is but demand to see it.
7) Oh and 4 planes but cant find enough wreckage to fill a radio flyer!
Not a shred of evidence to prove the official story!
1). Energy Beams and 'dustification'
Proven to exist
2). Thermite cutters or Thermite/Thermate/Nano-Therm*te/Supercalafragilistic Thermate
Proven true to be extremely functional
Here they are in action! Look how well they work!
3). Hologram planes, and/or no-planes
Proven true, no wreckage and cgi, not "holograms".
4). Mini-Nukes
Proven true, mrr's been around since 1950's.
5). UBL is a CIA asset
Proven true, a member listed in the cias al qaeda.
6). The 'pull it' myth
Proven true by demolition experts.
7). The Shanksville 'no-plane' fantasy
Proven fact, No wreckage, no plane
8). The Pentagon Missile myth
Unproven either true or false.
9). The 'Lost Trillions' Myth
Proven true rumsfelt admission
10). The Controlled Demolition as a pretext for war fantasy
Proven true, war was declared as a result.
11). The Silverstein insurance scam myth
Proven true, one claim turned down
12). The 'Dancing Jews' fairy tale
Proven true by their own admission
The only thing I see coming from the anticonspiracy crowd is blind ignorance to bog down the threads and force truthers to teach them what they should have but didnt learn in the government schools.