Indeed, it tends to involve questionable methods, such as systematic spying and snooping, secret surveillance, the use of undercover agents, enticement and entrapment.

• 甚至，执行这种法律容易涉及值得怀疑的各种法律手段，譬如，有针对性的侦查和窃听、秘密监视、密探布防、诱捕等等。