Alien-Invader Theory:

Non-scientific.

Based on non-operational constructs.

Immune to testing.

Non-falsifiable.

No predictive capacity.

Circular reasoning.

Selective data-mining.

Self-sealing arguments.

Anecdotal and haphazard data collection.

Low standards of evidence.

Unsupported causal attributions.

Based on discredited ecological concepts.

Contaminated information-pool.