Oh boy,
18 different different accounts all from the same country (Kuwait) boosting the same casting suggestion (Giancarlo Esposito) and downvoting every single other suggestion, The maker of all the accounts seems to be alileek203 (the oldest account out of all of them, the voting histories are identical)
The List:
https://www.mycast.io/profiles/5678/username/alileek203
https://www.mycast.io/profiles/2853/username/ailmohammad
https://www.mycast.io/profiles/41052/username/points_amerier472
https://www.mycast.io/profiles/41043/username/justice_amerier467
https://www.mycast.io/profiles/41042/username/bobby_amerier455
https://www.mycast.io/profiles/35220/username/crazy_harleybi
https://www.mycast.io/profiles/35218/username/zoe_birds28
https://www.mycast.io/profiles/41055/username/videos_amerier493
https://www.mycast.io/profiles/41054/username/channel_amerier439
https://www.mycast.io/profiles/35211/username/hello_my_name_23
https://www.mycast.io/profiles/41036/username/ok_america30
https://www.mycast.io/profiles/35369/username/young_america39
https://www.mycast.io/profiles/41046/username/bernie_amerier465
https://www.mycast.io/profiles/41041/username/timmmy_amerier43
https://www.mycast.io/profiles/41058/username/origin_amerier696
https://www.mycast.io/profiles/35253/username/elasti_diana281
https://www.mycast.io/profiles/41038/username/erica_crazyok3
https://www.mycast.io/profiles/41037/username/ms_mymatters__23
block all of the accounts to ensure your safety, and to let fakers like him know that he's not welcome here