[arin-ppml] Does ARIN do any follow-up on usage after granting IP(s)?

[Spam Auditor]

inetnum:     191.97.0/20
status:      allocated
aut-num:     N/A
owner:       PC Group PTY S.A.
created:     20140106

232.4.97.191.in-addr.arpa domain name pointer 
undertle83.oneandonlylinksite.com.
233.4.97.191.in-addr.arpa domain name pointer 
chrawaios30.oneandonlylinksite.com.
234.4.97.191.in-addr.arpa domain name pointer 
taiochu56.oneandonlylinksite.com.
235.4.97.191.in-addr.arpa domain name pointer 
smadios22.oneandonlylinksite.com.
236.4.97.191.in-addr.arpa domain name pointer 
snarkachu99.oneandonlylinksite.com.
237.4.97.191.in-addr.arpa domain name pointer 
oritia70.oneandonlylinksite.com.
238.4.97.191.in-addr.arpa domain name pointer 
cripios40.oneandonlylinksite.com.
239.4.97.191.in-addr.arpa domain name pointer 
lyeazard47.oneandonlylinksite.com.
240.4.97.191.in-addr.arpa domain name pointer 
doltortle53.oneandonlylinksite.com.

When you see that a /20 gets used immediately for outbound spam, 
randomized domain names, affiliate bulk email marketing.. hookupfinder..

Is this an appropriate use of IP Space?